US10272650B2 - Polyolefin based laminated structures with elastic properties - Google Patents
Polyolefin based laminated structures with elastic properties Download PDFInfo
- Publication number
- US10272650B2 US10272650B2 US15/763,675 US201615763675A US10272650B2 US 10272650 B2 US10272650 B2 US 10272650B2 US 201615763675 A US201615763675 A US 201615763675A US 10272650 B2 US10272650 B2 US 10272650B2
- Authority
- US
- United States
- Prior art keywords
- film
- strain
- laminated structure
- astm
- machine direction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/402—Coloured
- B32B2307/4023—Coloured on the layer surface, e.g. ink
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
- B32B2439/46—Bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/70—Food packaging
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2848—Three or more layers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
- Y10T428/2878—Adhesive compositions including addition polymer from unsaturated monomer
- Y10T428/2891—Adhesive compositions including addition polymer from unsaturated monomer including addition polymer from alpha-beta unsaturated carboxylic acid [e.g., acrylic acid, methacrylic acid, etc.] Or derivative thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2852—Adhesive compositions
- Y10T428/2896—Adhesive compositions including nitrogen containing condensation polymer [e.g., polyurethane, polyisocyanate, etc.]
Definitions
- Embodiments described herein relate generally to laminated structures with elastic properties, and more particularly to polyolefin based laminated structures that exhibit excellent elastic recovery. Such polyolefin based laminated structures can be used as alternative packaging to thermo-shrink bags, while providing enhanced appearance and printing protection.
- thermo-shrink bags are produced by a bi-oriented extrusion process. This process creates a thermal memory that allows the bag to shrink to the size of the product when the bag is exposed to heat. During the initial packaging process, the size of the bag is larger than the food product to be packaged. The bag is sealed after removing the air in a vacuum-sealing system. The bags are subsequently passed through a hot vapor tunnel or hot water bath in order to promote shrinkage.
- thermo-shrink bags are able to hold the shape of the product.
- the bi-oriented extrusion process used to make thermo-shrink bags is expensive and, due to the shrinkage step, time consuming.
- thermo-shrink bags made by a bi-oriented extrusion process allow for printing, the printed layer is externally exposed on the outside of the package and not properly protected.
- the process used to create such alternative packaging structures would ideally be more economical and efficient than the bi-oriented extrusion process used for producing thermo-shrink bags.
- Embodiments of the present disclosure meet those needs by providing laminated structures comprising (a) a first film comprising a first polyolefin; (b) an intermediate layer comprising a laminate adhesive; and (c) a second film comprising a second polyolefin.
- the laminated structures may be used as packaging, and more particularly as packaging for food products. Even more particularly, the laminated structures can be used as packaging for frozen food products.
- the laminated structures exhibit excellent elastic recovery properties, ensuring that the laminated structure can adapt and hold to the shape of the packaged product. Furthermore, the laminated structures can allow for the improved protection of printed layers and improved appearance as compared to thermo-shrink bags.
- a laminated structure comprises: (a) a first film comprising a first polyolefin; (b) an intermediate layer comprising a laminate adhesive; and (c) a second film comprising a second polyolefin.
- the laminated structure exhibits an elastic recovery greater than 80% in both the cross direction and the machine direction for 15% of strain, greater than 70% in both the cross direction and the machine direction for 50% strain, and greater than 50% in both the cross direction and the machine direction for 100% strain when measured at room temperature according to ASTM D5459.
- the laminated structure has a delamination force greater than 300 Win when measured at 23° C. according to ASTM F904.
- FIG. 1 is a bar chart depicting the puncture resistance for the monolayer film structures of Table 2 below.
- FIG. 2 is a bar chart depicting the tensile strength for the monolayer film structures of Table 2 below.
- FIG. 3 is a bar chart depicting the elastic recovery and the load at initial strain of the laminated structure of Laminated Example 1 below, wherein both properties are measured at room temperature according to ASTM D5459, according to one or more embodiments of the present disclosure.
- FIG. 4 is a bar chart depicting the elastic recovery and the load at initial strain of the laminated structure of Laminated Example 2 below, wherein both properties are measured at room temperature according to ASTM D5459, according to one or more embodiments of the present disclosure.
- FIG. 5 is a bar chart depicting the elastic recovery and the load at initial strain of the laminated structure of Laminated Example 3 below, wherein both properties are measured at room temperature according to ASTM D5459, according to one or more embodiments of the present disclosure.
- FIG. 6 is a bar chart depicting the elastic recovery and the load at initial strain of the laminated structure of Laminated Example 4 below, wherein both properties are measured at room temperature according to ASTM D5459, according to one or more embodiments of the present disclosure.
- FIG. 7 is a bar chart depicting the elastic recovery and the load at initial strain of the laminated structure of Laminated Example 5 below, wherein both properties are measured at room temperature according to ASTM D5459, according to one or more embodiments of the present disclosure.
- the components of the presently disclosed laminated structure include: (a) a first film comprising a first polyolefin; (b) an intermediate layer comprising a laminate adhesive; and (c) a second film comprising a second polyolefin.
- the laminated structures can be used as packaging, such as food packaging. More particularly, the laminated structures can be used for frozen food.
- Embodiments of the laminate structure may provide advantages over prior food packaging, such as thermo-shrink bags. Importantly, the instantly-disclosed laminated structures exhibit excellent elastic recovery properties, as well as improved protection of printed layers and improved appearance as compared to thermo-shrink bags.
- a laminated structure includes: (a) a first film comprising a first polyolefin; (b) an intermediate layer comprising a laminate adhesive; and (c) a second film comprising a second polyolefin.
- the lamination adhesive is located between the first and second film.
- the lamination adhesive is in direct contact and adheres the first film and the second film.
- the lamination adhesive can be located between and in direct contact with the first film and second film, without any intervening coatings or layers being applied between the lamination adhesive and the first and second film.
- the laminated structure exhibits an elastic recovery greater than 80% in both the cross direction and the machine direction for 15% of strain, greater than 70% in both the cross direction and the machine direction for 50% strain, and greater than 50% in both the cross direction and the machine direction for 100% strain when measured at room temperature according to ASTM D5459. In other embodiments, the laminated structure exhibits an elastic recovery greater than 85% in both the cross direction and the machine direction for 15% of strain, greater than 80% in both the cross direction and the machine direction for 50% strain, and greater than 60% in both the cross direction and the machine direction for 100% strain when measured at room temperature according to ASTM D5459.
- the laminated structure exhibits an elastic recovery greater than 90% in both the cross direction and the machine direction for 15% of strain, greater than 85% in both the cross direction and the machine direction for 50% strain, and greater than 60% in both the cross direction and the machine direction for 100% strain when measured at room temperature according to ASTM D5459.
- the laminated structure has a delamination force greater than 300 Win when measured at 23° C. according to ASTM F904. In other embodiments, the laminated structure has a delamination force greater than 500 Win when measured at 23° C. according to ASTM F904. In even further embodiments, the laminated structure has a delamination force greater than 800 Win when measured at 23° C. according to ASTM F904.
- the laminated structure exhibits a load at initial strain of greater than 0.5 lbf and less than 10.0 lbf in both the cross direction and the machine direction for 15% strain, 50% strain, and 100% strain when measured at room temperature according to ASTM D5459. In other embodiments, the laminated structure exhibits a load at initial strain of greater than 2.0 lbf and less than 5.0 lbf in both the cross direction and the machine direction for 15% strain, 50% strain, and 100% strain when measured at room temperature according to ASTM D5459.
- the laminated structure exhibits a load at initial strain of greater than 2.0 lbf and less than 4.0 lbf in the cross direction for 15% strain, 50% strain, and 100% strain, and exhibits a load at initial strain of greater than 2.0 lbf and less than 5.0 lbf in the machine direction for 15% strain, 50% strain, and 100% strain when measured at room temperature according to ASTM D5459.
- the load at initial strain in combination with the elastic recovery, is extremely important for a successful packaging process. If the load at initial strain is too high, the mechanism that opens the package will be overloaded. If the load at initial strain is too low, the package will have too low of grips to the opening plates of the packaging machine.
- the first and/or second film is a monolayer film. In other embodiments, the first and/or second film is a multilayer film. These films may be blown films or cast film extrusions. The multilayer films may be produced by coextruding the multiple layers using machinery and processes known for multiple layer extrusions. In certain embodiments, the multilayer films are produced using a monolayer extrusion. In other embodiments, the multilayer films are produced using a coextrusion.
- the films can include 1-9 layers. In many instances, the application of the laminated structure may dictate the number of layers to be used.
- the first and/or second film can have a thickness of about 10 to about 250 microns. In other embodiments, the first and/or second film can have a thickness of about 15 to about 100 microns. In further embodiments, the first and/or second film can have a thickness of about 20 to about 40 microns.
- the first film and the second film exhibit an elastic recovery greater than 80% in both the cross direction and the machine direction for 15% of strain, greater than 70% in both the cross direction and the machine direction for 50% strain, and greater than 65% in both the cross direction and the machine direction for 100% strain when measured at room temperature according to ASTM D5459. In other embodiments, the first film and the second film exhibit an elastic recovery greater than 85% in both the cross direction and the machine direction for 15% of strain, greater than 80% in both the cross direction and the machine direction for 50% strain, and greater than 65% in both the cross direction and the machine direction for 100% strain when measured at room temperature according to ASTM D5459.
- the first film and the second film exhibit an elastic recovery greater than 90% in both the cross direction and the machine direction for 15% of strain, greater than 85% in both the cross direction and the machine direction for 50% strain, and greater than 65% in both the cross direction and the machine direction for 100% strain when measured at room temperature according to ASTM D5459.
- ASTM D5459 ASTM D5459
- the first film and the second film exhibit a load at initial strain of greater than 0.5 lbf and less than 10.0 lbf in both the cross direction and the machine direction for 15% strain, 50% strain, and 100% strain when measured at room temperature according to ASTM D5459. In other embodiments, the first film and the second film exhibit a load at initial strain of greater than 0.5 lbf and less than 5.0 lbf in both the cross direction and the machine direction for 15% strain, 50% strain, and 100% strain when measured at room temperature according to ASTM D5459.
- the presently-disclosed laminated structures exhibit similar or better load at initial strain than the individual films, while also providing increased improved protection of printed layers and improved appearance due to the lamination.
- first polyolefin of the first film and second polyolefin of the second film are the same polyolefin. In other embodiments, the first polyolefin of the first film and second polyolefin of the second film are different polyolefins.
- the first polyolefin and/or the second polyolefin include a polyethylene, for example, a polyethylene homopolymer, a polyethylene copolymer, or combinations thereof.
- the polyethylene of the first polyolefin and the polyethylene of the second polyolefin are the same polyethylene. In other embodiments, the polyethylene of the first polyolefin and the polyethylene of the second polyolefin are different polyethylenes.
- the polyethylene of the first polyolefin and/or the polyethylene of the second polyolefin has a density from about 0.840 g/cm 3 to about 0.930 g/cm 3 according to ASTM D792 and a melt index (I 2 ) of less than 4.0 g/10 minutes according to ASTM 1238.
- the polyethylene of the first polyolefin and/or the polyethylene of the second polyolefin has a density from about 0.860 g/cm 3 to about 0.920 g/cm 3 according to ASTM D792 and a melt index (I 2 ) of less than 2.0 g/10 minutes according to ASTM 1238.
- the polyethylene of the first polyolefin and/or the polyethylene of the second polyolefin has a density from about 0.860 g/cm 3 to less than 0.920 g/cm 3 according to ASTM D792 and a melt index (I 2 ) of less than 2.0 g/10 minutes according to ASTM 1238.
- the polyethylene of the first polyolefin and/or the polyethylene of the second polyolefin have a melt flow ratio of I 10 /I 2 range from about 5 to about 32.
- polyethylenes that can be included in the polyolefin of the first film and/or the polyolefin of the second film may include ethylene ⁇ -olefin block copolymers, metallocene-catalyzed linear low density polyethylenes, metallocene-catalyzed ethylene propylene ⁇ -olefin copolymers, and low density polyethylene.
- ethylene ⁇ -olefin block copolymers metallocene-catalyzed linear low density polyethylenes
- metallocene-catalyzed ethylene propylene ⁇ -olefin copolymers metallocene-catalyzed ethylene propylene ⁇ -olefin copolymers
- low density polyethylene ethylene ⁇ -olefin block copolymers
- metallocene-catalyzed linear low density polyethylenes metallocene-catalyzed ethylene propylene ⁇ -olefin copolymers
- low density polyethylene
- the polyethylene suitable for use may include, by way of example and not limitation, INFUSETM 9007, VERSIFYTM 2200, and ELITETM AT 6101, LDPE 203M, and LPDE 206M all available from The Dow Chemical Company, Midland Mich.
- the first film and/or the second film comprises a blend of linear low density polyethylene and low density polyethylene.
- the first film and/or the second film can comprise a blend including from about 0% to about 30% low density polyethylene and from about 70% to about 100% linear low density polyethylene.
- the first film and/or the second film can comprise a blend including from about 0% to about 10% low density polyethylene and from about 90% to about 100% linear low density polyethylene.
- the first film and/or the second film can comprise a blend including from about 0% to about 5% low density polyethylene and from about 95% to about 100% linear low density polyethylene.
- the first film and/or second film may include additional resins used as secondary materials.
- resins can include, by way of example and not limitation, ethylene-vinyl acetate, ethylene vinyl alcohol, polyamide, polyvinylidene chloride, polypropylene, and linear low density polyethylene grafted maleic anhydride.
- Such resins can be coextruded with the present monolayer or multilayer films.
- ethylene vinyl alcohol can be included as an oxygen barrier material.
- Such additional resins can be included in the same layer as the first and/or second film, or can be included as separate layers.
- the laminate adhesive comprises a solvent-less laminate adhesive or a solvent-based laminate adhesive. In various embodiments, the laminate adhesive comprises a water based laminate adhesive. In certain embodiments, the laminate adhesive has a weight per square meter of about 0.5 g/m 2 to about 5 g/m 2 , more preferably from about 1 g/m 2 to about 3 g/m 2 .
- the laminate adhesive can be applied to the first and second film in any suitable manner.
- the methods of the present disclosure may include, by way of example and not limitation, the use of a laminating machine, gravure coating, roll coating, wire rod coating, flexographic printing, spray coating, screen printing, and the like.
- the lamination adhesive is located between the first and second film.
- the lamination adhesive is in direct contact with the first film and the second film.
- the lamination adhesive can be located between and in direct contact with the first film and second film, without any intervening coatings or layers being applied between the lamination adhesive and the first and second film.
- the films surfaces that will be coated with lamination adhesive can be corona treated to increase surface energy and provide enough wettability for the adhesive components.
- the laminate adhesive comprises a polyurethane.
- the adhesive is a two component polyol and isocyanate mixture with optional components such as catalysts, diluents, etc.
- An exemplary solvent-less laminate bi-component adhesive includes a polyurethane that includes a first component that is an isocyanate terminated prepolymer.
- the second component of the polyurethane is a polyester/polyether that is made with linear and difunctional polyols.
- An exemplary solvent based laminate adhesive comprises a polyurethane that includes a first component that is a 100% polyester based with methyl ethyl ketone as a diluent.
- the second component is an isocyanate-terminated prepolymer.
- the adhesives suitable for use may include, by way of example and not limitation, MOR-FREETM 970/C83, MOR-FREETM 970/CR137, MOR-FREETM 980/CR85, and ADCOTETM 545/F BR, all available from The Dow Chemical Company, Midland Mich.
- the laminate adhesive comprises an acrylic.
- An exemplary water based laminate adhesive includes an acrylic that is made from a combination of butyl acrylate, acrylic acid, methyl methacrylate, and ethyl acrylate monomers.
- the acrylic may be a non-branched polymer.
- the water based laminate adhesive may include an acrylic having a pH from about 6 to about 7, and a viscosity from about 50 cps to about 150 cps.
- an adhesive suitable for use may include, by way of example and not limitation, ROBONDTM L-90D, available from The Dow Chemical Company, Midland Mich.
- the laminate structure includes a toner or ink image printed on said first film.
- the top side of the first film (which is the side facing the laminate adhesive) is printed.
- the printed, top side of the first film can be in direct contact with the laminate adhesive.
- the first film may be printed using machinery and processes known in the art.
- the first film may be printed by using corona printing, a digital press, and liquid toner/ink.
- the lamination adhesive may be applied to the printed first film surface prior to lamination to the second film.
- the resins used for the production of the films are listed in Table 1 below.
- Film structures which can include the resins of Table 1, are listed in Table 2 below.
- the 60 ⁇ m films can include the listed resins in three layers in the amounts listed in Table 2, which, for example can be coextruded.
- the films can comprise a blend of linear low density polyethylene and low density polyethylene.
- the films can also include additionally additives, such as slip agents and antiblock agents.
- layers A and C of the film structures of Table 2 can include slip agents and antiblock agents.
- the film structures can include between 0% and about 3% of a slip agent.
- the film structures can include between about 0% and about 2% of an antiblock agent.
- a slip agent suitable for use may include, by way of example and not limitation, AB 50035, available from Cromex, Sao Paulo, Brasil.
- an antiblock agent for use may include, by way of example and not limitation, DL 50017, available from Cromex, Sao Paulo, Brasil.
- the films can be made in a Dr. Collin extruder, and are targeted to have a melting temperature for a good plastification of all resins and good bubble stability to provide very low thickness variation. During the extrusion process, the films are produced under blow up ratio (BUR) from about 1.0 to about 5.0, and more preferably from about 2.1 to about 4.0. The films of Table 2 were produced with a BUR of 3.0.
- Adhesives used for the laminated structures Commercial Density Viscosity Name Name Composition (g/cm 3 ) (cps)
- Laminated structures which were made using two films comprising Film Example 3 (one film being 20 ⁇ m thick and the other film being 40 ⁇ m thick) and the listed lamination adhesives in Table 3, are listed in Table 4 below.
- the elastic recovery and load at initial strain properties were measured for all of the monolayer film structures of Table 2, and the results are presented in Table 5 below.
- the elastic recovery and the load at initial strain were both measured at room temperature according to ASTM D5459.
- the elastic recovery should be greater than 80% in both the cross direction and the machine direction for 15% of strain, greater than 70% in both the cross direction and the machine direction for 50% strain, and greater than 65% in both the cross direction and the machine direction for 100% strain.
- the load at initial strain should be greater than 0.5 lbf and less than 10.0 lbf in both the cross direction and the machine direction for 15% strain, 50% strain, and 100% strain.
- Film Examples 1-3 reached the required levels of elastic recovery and load at initial strain, and are therefore suitable films to be laminated with the described adhesive systems to form the instantly described laminated structures.
- Film Examples 4 and 5 did not reach the required performance levels, particularly with regard to elastic recovery properties, and are therefore not suitable films for the instantly described laminated structures.
- This reinforces that the linear low density polyethylene component of the first and second films should most preferably have a density below 0.920 g/cm 3 , and that the low density polyethylene component should be used as a minor phase, preferably lower than 30%, more preferably lower than 10%.
- Film Examples 1-5 Based on above measured performances for the monolayer film structures (Film Examples 1-5), different Film Examples can be used for different packaging purposes.
- Film Example 1 is an option for the films of the laminated structure when high elastic recovery and low tensile strength is needed, and could be applied for products that have irregular shapes.
- Film Example 3 is an option for the films of the laminated structure when a medium elastic recovery performance (especially for 100% strain) and a high tensile strength is needed, and could be applied for products that have a more uniform shape and require excellent mechanical resistance.
- Film Examples 4 and 5 did not reach the required performance levels, particularly with regard to elastic recovery properties, and are therefore not suitable films for the instantly described laminated structures.
- the elastic recovery and load at initial strain properties were measured for all of the laminated structures of Table 4, and the results are presented in FIGS. 3-7 .
- the elastic recovery and the load at initial strain were both measured at room temperature according to ASTM D5459.
- the elastic recovery should be greater than 80% in both the cross direction and the machine direction for 15% of strain, greater than 70% in both the cross direction and the machine direction for 50% strain, and greater than 50% in both the cross direction and the machine direction for 100% strain.
- the load at initial strain should be greater than 0.5 lbf and less than 10.0 lbf in both the cross direction and the machine direction for 15% strain, 50% strain, and 100% strain.
- all laminated structures reached the required levels of elastic recovery and load at initial strain.
- the laminate bond results (i.e. delamination force) were measured for all of the laminated structures of Table 4, and are the results are presented in Table 6 below.
- the delamination force was measured at 23° C. according to ASTM F904.
- Laminate bond results for laminate film structures Avg. Laminate Bond Description (g/in) Laminated Example 1 1326.02 Laminated Example 2 1397.22 Laminated Example 3 821.18 Laminated Example 4 505.38 Laminated Example 5 1087.13
Landscapes
- Laminated Bodies (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US15/763,675 US10272650B2 (en) | 2015-09-30 | 2016-09-20 | Polyolefin based laminated structures with elastic properties |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201562235272P | 2015-09-30 | 2015-09-30 | |
PCT/US2016/052635 WO2017058572A1 (en) | 2015-09-30 | 2016-09-20 | Polyolefin based laminated structures with elastic properties |
US15/763,675 US10272650B2 (en) | 2015-09-30 | 2016-09-20 | Polyolefin based laminated structures with elastic properties |
Publications (2)
Publication Number | Publication Date |
---|---|
US20180272667A1 US20180272667A1 (en) | 2018-09-27 |
US10272650B2 true US10272650B2 (en) | 2019-04-30 |
Family
ID=57045428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/763,675 Active US10272650B2 (en) | 2015-09-30 | 2016-09-20 | Polyolefin based laminated structures with elastic properties |
Country Status (10)
Country | Link |
---|---|
US (1) | US10272650B2 (pt) |
EP (1) | EP3356135B1 (pt) |
JP (1) | JP6900368B2 (pt) |
CN (1) | CN108025529B (pt) |
AR (1) | AR106111A1 (pt) |
BR (1) | BR112018004677B1 (pt) |
CO (1) | CO2018003783A2 (pt) |
ES (1) | ES2871043T3 (pt) |
MX (1) | MX2018003857A (pt) |
WO (1) | WO2017058572A1 (pt) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11851539B2 (en) | 2018-12-04 | 2023-12-26 | Dow Global Technologies Llc | Lamination film and adhesive therefor |
US12043711B2 (en) | 2019-10-25 | 2024-07-23 | Dow Global Technologies Llc | Lamination film and adhesive therefor |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2017058572A1 (en) * | 2015-09-30 | 2017-04-06 | Dow Global Technologies Llc | Polyolefin based laminated structures with elastic properties |
Citations (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2154178A (en) | 1984-01-23 | 1985-09-04 | Grace W R & Co | Linear polyethylene stretch/shrink films |
US5032463A (en) | 1988-07-18 | 1991-07-16 | Viskase Corporation | Very low density polyethylene film from blends |
WO1994017113A1 (en) | 1993-01-19 | 1994-08-04 | Exxon Chemical Patents Inc. | Elastic alpha-olefin/cyclic olefin copolymers |
WO1994028066A2 (en) | 1993-06-01 | 1994-12-08 | Shell Oil Company | Elastomeric polybutylene polymer |
EP0687558A2 (en) | 1994-05-19 | 1995-12-20 | Viskase Corporation | Polyolefin stretch film |
EP0780214A1 (en) | 1994-06-30 | 1997-06-25 | Mitsubishi Plastics Inc. | Food packaging stretch film |
US6534137B1 (en) | 1999-10-12 | 2003-03-18 | Cryovac, Inc. | Two-component, heat-sealable films |
US20030091801A1 (en) * | 2000-03-07 | 2003-05-15 | Eiji Mizuno | Composite base material and adhesive film |
US20030123719A1 (en) * | 2001-12-27 | 2003-07-03 | Akira Kurahashi | Medical image processing apparatus, medical image processing method, program and a recording medium thereof |
EP1362793A2 (en) | 2002-05-16 | 2003-11-19 | Sealed Air Corporation | Packaging structure having a frame and film |
WO2004012938A1 (en) | 2002-08-05 | 2004-02-12 | Cryovac, Inc. | High free shrink, high modulus, low shrink tension film with elastic recovery |
WO2006101930A2 (en) | 2005-03-17 | 2006-09-28 | Dow Global Technologies Inc. | Compositions of ethylene/alpha-olefin multi-block interpolymer suitable for films |
WO2009094506A1 (en) | 2008-01-24 | 2009-07-30 | Clopay Plastic Products Company, Inc. | Elastomeric materials |
WO2012003510A1 (en) | 2010-07-02 | 2012-01-05 | Dow Global Technologies Llc | Stretch hoods made from uldpe-rich formulations |
WO2014081516A1 (en) | 2012-11-21 | 2014-05-30 | Dow Global Technologies Llc | A film composition, film made from the film composition and a multi-layer film including the film and articles made therefrom |
WO2014172350A1 (en) | 2013-04-15 | 2014-10-23 | Dow Global Technologies Llc | Stretch-sleeve film |
US20180272667A1 (en) * | 2015-09-30 | 2018-09-27 | Dow Global Technologies Llc | Polyolefin based laminated structures with elastic properties |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5795834A (en) * | 1995-12-22 | 1998-08-18 | Minnesota Mining & Manufacturing Company | Adhesive tape and method of making |
JP2002264273A (ja) * | 2001-03-12 | 2002-09-18 | Denki Kagaku Kogyo Kk | 多層フィルム |
EP1283106A4 (en) * | 2001-03-15 | 2005-12-14 | Mitsui Chemicals Inc | LAMINATED BODY AND DISPLAY DEVICE USING THE LAMINATED BODY |
JP2012208188A (ja) * | 2011-03-29 | 2012-10-25 | Fuji Seal International Inc | 筒状ラベル |
CN103434237B (zh) * | 2013-09-06 | 2016-08-24 | 金石包装(嘉兴)有限公司 | 一种易撕型干式复合片材及其生产方法 |
CN104097849B (zh) * | 2014-06-28 | 2017-05-24 | 北京印刷学院 | 一种缓释二氧化氯杀菌剂的保鲜包装材料及其制备方法 |
-
2016
- 2016-09-20 WO PCT/US2016/052635 patent/WO2017058572A1/en active Application Filing
- 2016-09-20 ES ES16775054T patent/ES2871043T3/es active Active
- 2016-09-20 JP JP2018512195A patent/JP6900368B2/ja active Active
- 2016-09-20 US US15/763,675 patent/US10272650B2/en active Active
- 2016-09-20 CN CN201680053334.2A patent/CN108025529B/zh active Active
- 2016-09-20 EP EP16775054.6A patent/EP3356135B1/en active Active
- 2016-09-20 BR BR112018004677-9A patent/BR112018004677B1/pt active IP Right Grant
- 2016-09-20 MX MX2018003857A patent/MX2018003857A/es unknown
- 2016-09-22 AR ARP160102891A patent/AR106111A1/es active IP Right Grant
-
2018
- 2018-04-10 CO CONC2018/0003783A patent/CO2018003783A2/es unknown
Patent Citations (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2154178A (en) | 1984-01-23 | 1985-09-04 | Grace W R & Co | Linear polyethylene stretch/shrink films |
US5032463A (en) | 1988-07-18 | 1991-07-16 | Viskase Corporation | Very low density polyethylene film from blends |
WO1994017113A1 (en) | 1993-01-19 | 1994-08-04 | Exxon Chemical Patents Inc. | Elastic alpha-olefin/cyclic olefin copolymers |
WO1994028066A2 (en) | 1993-06-01 | 1994-12-08 | Shell Oil Company | Elastomeric polybutylene polymer |
EP0687558A2 (en) | 1994-05-19 | 1995-12-20 | Viskase Corporation | Polyolefin stretch film |
EP0780214A1 (en) | 1994-06-30 | 1997-06-25 | Mitsubishi Plastics Inc. | Food packaging stretch film |
US6534137B1 (en) | 1999-10-12 | 2003-03-18 | Cryovac, Inc. | Two-component, heat-sealable films |
US20030091801A1 (en) * | 2000-03-07 | 2003-05-15 | Eiji Mizuno | Composite base material and adhesive film |
US20030123719A1 (en) * | 2001-12-27 | 2003-07-03 | Akira Kurahashi | Medical image processing apparatus, medical image processing method, program and a recording medium thereof |
EP1362793A2 (en) | 2002-05-16 | 2003-11-19 | Sealed Air Corporation | Packaging structure having a frame and film |
WO2004012938A1 (en) | 2002-08-05 | 2004-02-12 | Cryovac, Inc. | High free shrink, high modulus, low shrink tension film with elastic recovery |
WO2006101930A2 (en) | 2005-03-17 | 2006-09-28 | Dow Global Technologies Inc. | Compositions of ethylene/alpha-olefin multi-block interpolymer suitable for films |
WO2009094506A1 (en) | 2008-01-24 | 2009-07-30 | Clopay Plastic Products Company, Inc. | Elastomeric materials |
WO2012003510A1 (en) | 2010-07-02 | 2012-01-05 | Dow Global Technologies Llc | Stretch hoods made from uldpe-rich formulations |
WO2014081516A1 (en) | 2012-11-21 | 2014-05-30 | Dow Global Technologies Llc | A film composition, film made from the film composition and a multi-layer film including the film and articles made therefrom |
WO2014172350A1 (en) | 2013-04-15 | 2014-10-23 | Dow Global Technologies Llc | Stretch-sleeve film |
US20180272667A1 (en) * | 2015-09-30 | 2018-09-27 | Dow Global Technologies Llc | Polyolefin based laminated structures with elastic properties |
Non-Patent Citations (7)
Title |
---|
International Preliminary Report on Patentability PCT/US2016/052635 dated Sep. 20, 2016. |
International Search Report PCT/US2016/052635 dated Aug. 23, 2016. |
Pegoretti, Investigation of Nonelastic Response of Semicrystalline Polymers at High Strain Levels, Journal of Applied Polymer Science, 2000, vol. 78, 1664-1670, John Wiley & Sons, Inc. |
Ricco, Energy Storage and Strain-Recovery Processes in Highly Deformed Semicrystalline Poly(butylene terephthalate), Journal of Polymer Science, 2002, vol. 40, 236-243. |
Tian, Indentation of shape memory polymers: Characterization of thermomechanical and shape recovery properties. Polymer, 2013, vol. 54, 1405-1414, Elsevier. |
Written Opinion PCT/US2016/052635 dated Sep. 30, 2016. |
Zitzumbo, Laser technology application: Deformation and elastic recovery of semi-crystalline polymers, European Polymer Joumal, 2006, vol. 42, 1298-1304. |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11851539B2 (en) | 2018-12-04 | 2023-12-26 | Dow Global Technologies Llc | Lamination film and adhesive therefor |
US12043711B2 (en) | 2019-10-25 | 2024-07-23 | Dow Global Technologies Llc | Lamination film and adhesive therefor |
Also Published As
Publication number | Publication date |
---|---|
MX2018003857A (es) | 2018-06-15 |
AR106111A1 (es) | 2017-12-13 |
BR112018004677B1 (pt) | 2022-05-17 |
JP2018532615A (ja) | 2018-11-08 |
US20180272667A1 (en) | 2018-09-27 |
CN108025529A (zh) | 2018-05-11 |
CO2018003783A2 (es) | 2018-07-31 |
BR112018004677A2 (pt) | 2018-09-25 |
CN108025529B (zh) | 2020-10-30 |
WO2017058572A1 (en) | 2017-04-06 |
JP6900368B2 (ja) | 2021-07-07 |
EP3356135B1 (en) | 2021-04-21 |
ES2871043T3 (es) | 2021-10-28 |
EP3356135A1 (en) | 2018-08-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN109153225A (zh) | 多层结构 | |
CN109070558A (zh) | 具有阻隔性能的聚乙烯基层压膜结构 | |
US11752746B2 (en) | Bi-oriented, linear, low-density polyethylene film with improved sealing properties | |
US9566770B2 (en) | Polyolefin composite film | |
US20180272672A1 (en) | Coated, Oriented, Linear, Low-Density, Polyethylene Films | |
US20200369014A1 (en) | Polyethylene film compositions, laminates, and methods for making the same | |
US20180272671A1 (en) | Bi-Oriented, Cavitated, Linear, Low-Density Films with Good Sealing Properties | |
CN113165327B (zh) | 层压结构和并有其的柔性包装材料 | |
US20130095338A1 (en) | Soft Multi-Layer Shrink Films | |
CN113195217B (zh) | 层压结构和合并有其的软包装材料 | |
US20160039181A1 (en) | Multilayer Metallized Cast Film and Packaging Made Therefrom | |
US10272650B2 (en) | Polyolefin based laminated structures with elastic properties | |
EP3738765B1 (en) | Multilayer structure | |
KR101154590B1 (ko) | 폴리프로필렌계 필름 및 그 제조 방법 | |
JP6933282B2 (ja) | シーラントフィルム、並びにそれを用いた包装材及び包装袋 | |
US20230147444A1 (en) | Plastomer toughened/stiffened polyolefin multilayer films and laminates comprising same | |
US20210237408A1 (en) | Multilayer films for use in flexible packaging materials | |
TWI842788B (zh) | 層壓結構及併有其之可撓性封裝材料 | |
US10357940B2 (en) | Multilayer metallized cast film and packaging made therefrom | |
KR20120131749A (ko) | 무용제형 열접착 이축 배향 필름의 접착층 형성용 코폴리머 조성물 및 이것을 이용한 무용제형 열접착 이축 배향 필름 | |
TWI843739B (zh) | 用於可撓性封裝材料中之多層膜 | |
US20230311467A1 (en) | Enhanced Bag Drop Film and Packaging Using Oriented High-Density Polyethylene | |
EA044532B1 (ru) | Многослойная структура |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FEPP | Fee payment procedure |
Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
AS | Assignment |
Owner name: DOW GLOBAL TECHNOLOGIES LLC, MICHIGAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DOW BRASIL INDUSTRIA E COMERCIO DE PRODUTOS QUIMICOS LTDA.;REEL/FRAME:045370/0688 Effective date: 20160823 Owner name: DOW BRASIL INDUSTRIA E COMERCIO DE PRODUTOS QUIMIC Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GARGALAKA, JOAO;MAZZOLA, NICOLAS C.;GOMES, JORGE C.;REEL/FRAME:045370/0444 Effective date: 20160317 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT VERIFIED |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |